Non-Derivative Fair Value Measurements (Fair Value of Instruments Recorded at Other Than Fair Value and Special Use Funds) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special use funds: nuclear decommissioning fund assets	$ 9,624	$ 9,799
Available for sale debt securities amortized cost	$ 3,818	3,720
Special Use Funds Nuclear Decommissioning Funds Weighted Average Maturity	9 years
Other investments weighted average maturity	9 years
Other assets, current	$ 1,227	1,438
Other	9,940	9,459
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special Use Funds Fair Value Disclosure	1,324	1,342
Other Investments Financial Instruments Primarily Notes Receivable Fair Value Disclosure	612	629
Long Term Debt Including Current Maturities Fair Value And Carrying Value	87,456	80,446
Other assets, current	373	396
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special Use Funds Fair Value Disclosure	1,324	1,343
Other Investments Financial Instruments Primarily Notes Receivable Fair Value Disclosure	612	629
Long Term Debt Including Current Maturities Fair Value And Carrying Value	84,009	76,428
Other	239	233
Florida Power & Light Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special use funds: nuclear decommissioning fund assets	6,747	6,874
Available for sale debt securities amortized cost	1,796	1,780
Other assets, current	217	257
Other	1,009	934
Florida Power & Light Company | Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special Use Funds Fair Value Disclosure	905	915
Long Term Debt Including Current Maturities Fair Value And Carrying Value	28,698	26,745
Florida Power & Light Company | Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Special Use Funds Fair Value Disclosure	906	916
Long Term Debt Including Current Maturities Fair Value And Carrying Value	$ 26,981	$ 24,718